.nav-list {
    position: relative;
    float: left;
    width: 90px;
    height: 100%;
    // background-color: red;
    ul {
        li {
            a {
                display: block;
                width: 90px;
                height: 50px;
                text-align: center;
                line-height: 50px;
                border-right: 1px solid #ccc;
                border-bottom: 1px solid #ccc;
                color: #333;
                background: #eee;
            }
        }
        .current {
            a {
                border-right: none;
                background-color: #fff;
            }
        }
    }

}

.content {
    height: 100%;
    // background-color: green;
    overflow: hidden;
    ul {
        li {
            float: left;
            width: 33.33%;
            text-align: center;            
            img {
                width: 80%;
            }
        }
    }
}